SCIENCE WEEK 6 - ELECTRICITY AND MAGNETISM

Question 1

vector fields that are used to determine the distribution of magnetic force in areas
inside or outside

Answer 1

Magnetic Field

Question 2

Same pole resist while different pole attracts

Answer 2

Magnetism

Question 3

manifest interrelation between magnetism and electricity

Answer 3

Electromagnet

Question 4

– phenomenon in which electric current is generated by varying magnetic field
– Changing magnetic field produces an electric current

Answer 4

Electromagnetic Induction

Question 5

The force between the velocity and magnetic field are acting perpendicularly, the righthand rule is used to determine the right direction of magnetic force

Answer 5

Right Hand Rule

Question 6

change in magnetic flux, induces a current (hence induced emf)

Answer 6

Faraday’s Law

Question 7

paved the way for generating electricity, through the process known as electromagnetic induction

Answer 7

Michael Faraday

Question 8

proportional to the rate of change of the magnetic flux

Answer 8

Induced EMF

Question 9

the strength of a magnetic field measured in terms of the number of lines of force

Answer 9

Magnetic Flux

Question 10

the flux per unit area of a loop of wire perpendicular to the field

Answer 10

Magnetic Field

Question 11

polarity of an induced EMF is such that it tends to produce a current which opposes
the change in the magnetic flux

Answer 11

Lenz’s Law

Question 12

converts electrical energy to mechanical energy

Answer 12

Motors

Question 13

converts mechanical energy into electrical energy

Answer 13

Generators

Question 14

Magnetic flux increases when a magnet is inserted into the solenoid; the
galvanometer will deflect to the ___

Answer 14

Right

Question 15

If the magnet is pulled out of the solenoid, the magnetic flux decreases, and the
galvanometer will deflect to the ___

Answer 15

Left

Question 16

If the magnet is held still or stationary inside the solenoid, the galvanometer reads __ because there is no change in magnetic flux and therefore no induced voltage

Answer 16

zero